I voted under 8, but I'm not 100% sure. I was somewhere between 7 and 9 when my older cousin ran a BECMI game for his younger brother (who was my age) and I. We obviously had no idea what we were doing, but it was fun and it got me interested in the concept. We ended up moving on to Palladium's TMNT game around the time the 1987 cartoon came out and the main thing I remember was I played a mutant porcupine.